You need to upgrade your Flash Player The theme of this blog is not only and obviously space, but in particular “terrestrial worlds”, places that tend to have surfaces on which one could walk or at least attach oneself to. These places sometimes also have other earth-like familiar features such as atmospheres, weather, volcanos, geysers and perhaps, we are finding, even exotic oceans, rivers or lakes that are not necessarily made of familiar materials we are used to here at home. The second theme is imagery. Occasionally I do some retouching of images when needed if an image is incomplete or sometimes “dirty” or noisy. I will attempt to correct image shortcomings based upon other images or well-accepted presumed attributes. When this is done, notes will be offered as to what was added, why and sometimes how it was done. This way no one should ever wonder if something they are looking at is real or photoshop.

Long-Overdue WTF Follow Up

Back in 2007 I posted this image of a dark hole on Mars. In late 2011 they took additional images of a similar feature with the HiRISE cameras on Mars Reconnaissance Orbiter. Turns out it is in fact a “sky light” or a hole in the surface to an underground cavern. This one spans 35 meters (115 feet) across and 20 meters (65 feet) deep.

It’s origins are likely due to ancient lava flows that continued underground and eventually were drained to leave behind a cavern. How vast such a system might be is yet unknown.

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